Zhang, La Jolla

Chengjin Zhang, La Jolla CA

Patent application number

Description

Published

20120269104

Method and System for a Greedy User Group Selection with Range Reduction in TDD Multiuser MIMO Downlink Transmission - Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a communication system, based on a signal for a user within a search range and at least one other signal for one other user within the search range. The search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals. The signal for the user may be selected from the search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the search range.

10-25-2012

Chengjin Zhang, La Jolla, CA US

Patent application number

Description

Published

20090253381

Method and System For Greedy User Group Selection With Range Reduction for FDD Multiuser MIMO Downlink Transmission With Finite-Rate Channel State Information Feedback - Aspects of a greedy search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise receiving feedback information via a communication channel for a plurality of users in a frequency division duplex system. The system capacity may be maximized using the feedback information based on a signal from a single user within a reduced search range or based on the signal from the single user and at least one other signal from another user within a remaining portion of the search range. The feedback information may comprise quantized gain and/or direction of the channel state information of the users.

10-08-2009

20100150036

METHOD AND SYSTEM FOR AN IMPROVED USER GROUP SELECTION SCHEME WITH FINITE-RATE CHANNEL STATE INFORMATION FEEDBACK FOR FDD MULTIUSER MIMO DOWNLINK TRANSMISSION - A method for communication is disclosed and may include performing, using one or more processors and/or circuits, selecting, from a plurality of signal receiving users in a multiuser communication system, a first signal receiving user having a channel gain that is greater than a channel gain of each corresponding signal receiving user of a remaining portion of the plurality of signal receiving users. A second signal receiving user may be selected from the remaining portion of the plurality of signal receiving users, based on a feedback information comprising orthogonality of a channel direction of the second signal receiving user with respect to a channel direction of the first user. The feedback information may include a channel gain of the second signal receiving user. The communication system may include a frequency division duplex (FDD) multiuser communication system.

06-17-2010

20100158148

Double Search User Group Selection Scheme with Range Reduction for FDD Multiuser MIMO Downlink Transmission with Finite-Rate Channel State Information Feedback - Aspects of a double search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise maximizing system capacity using feedback information for a plurality of signals in a frequency division duplex system to reduce a search range within which a group of signals having maximum channel gain are located. The feedback information may comprise quantized gain for the signals. Quantized channel direction for the signals within the reduced search range may be requested and received by the transmitter. One or two signals from the reduced search range that maximizes system capacity may be selected. The receivers associated with these signals may then be selected as the user group.

06-24-2010

20110070913

Method and System for a Range Reduction Scheme for User Selection in a Multiuser MIMO Downlink Transmission - Various aspects of a method and a system for a range reduction scheme for user selection in a multiuser MIMO downlink transmission are presented. Aspects of a system for range reduction may comprise a range reduction processor that determines a plurality of channel measurements corresponding to a plurality of signals. The range reduction processor may compute a plurality of channel capacities based on the channel measurements corresponding to a subset of the plurality of signals having channel gain that is greater than a remaining portion of the plurality of signals. Aspects of a method may comprise determining a plurality of channel measurements corresponding to a plurality of signals, and computing a plurality of channel capacities based on said channel measurements corresponding to a subset of the plurality of signals having a channel gain that is greater than a remaining portion of the plurality of signals.

03-24-2011

20110103505

METHOD AND SYSTEM FOR A SIMPLIFIED USER GROUP SELECTION SCHEME WITH FINITE-RATE CHANNEL STATE INFORMATION FEEDBACK FOR FDD MULTIUSER MIMO DOWNLINK TRANSMISSION - A method for processing signals in a communication system includes selecting, from a plurality of users, a first user having a channel gain that is greater than a channel gain corresponding to a remaining portion of the plurality of users. At least a second user may be selected from a portion of the remaining portion of the plurality of users, based on a feedback channel gain of the second user. The selected second user may have a channel direction that is approximately orthogonal to a channel direction of the first user. System capacity may be determined based on the selecting of the first user and the selecting of the second user. The channel gain may be defined by a quantized channel gain. A quantized channel direction of the selected first user may be determined for the selecting of the second user.

05-05-2011

20110199926

METHOD AND SYSTEM FOR AN IMPROVED USER GROUP SELECTION SCHEME WITH FINITE-RATE CHANNEL STATE INFORMATION FEEDBACK FOR FDD MULTIUSER MIMO DOWNLINK TRANSMISSION - A method for channel selection in a communication system includes receiving a broadcast signal comprising a beam vector, generating a first channel state information message based on the power of the broadcast signal, generating a second channel state information message based on the direction of the broadcast signal with respect to the beam vector, and transmitting a feedback signal comprising at least the first channel state information message and the second channel state information message. The communication system may include a frequency division duplex (FDD) multiuser communication system or a time division duplex (TDD) multiuser communication system. The first channel state information message may include a channel gain with respect to the broadcast signal. The second channel state information message may include a measure of orthogonality between the broadcast signal and the beam vector.

08-18-2011

20110206153

Channel Quantization for Multiuser Diversity - A method and system for channel quantization for multiuser diversity are provided. A quantizer may utilize quantization levels determined based on an objective function J that corresponds to a performance metric for a finite-rate feedback multiuser downlink communication system. The quantization levels may be obtained based on the results of maximizing the objective function J by means of an optimization algorithm. The optimization algorithm may be a multivariate optimization algorithm that may be implemented utilizing an iterative approach. The quantizer may utilize the quantization levels to quantize channel state information (CSI) to achieve multiuser diversity in the finite-rate feedback multiuser system. The performance metric may be based on signal-to-noise ratio (SNR), bit error rate (BER), and/or system capacity. The quantization levels may be utilized in a multiuser system where distributed quantization is needed for optimal selection.

08-25-2011

20120250552

Method and System for Greedy User Group Selection with Range Reduction for FDD Multiuser MIMO Downlink Transmission with Finite-Rate Channel State Information Feedback - Aspects of a greedy search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise receiving feedback information via a communication channel for a plurality of users in a frequency division duplex system. The system capacity may be maximized using the feedback information based on a signal from a single user within a reduced search range or based on the signal from the single user and at least one other signal from another user within a remaining portion of the search range. The feedback information may comprise quantized gain and/or direction of the channel state information of the users.

10-04-2012

20130003619

Method and System for a Double Search User Group Selection Scheme with Range Reduction in TDD Multiuser MIMO Downlink Transmission - Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a time division duplex (TDD) multiple-input multiple-output (MIMO) system, based on reducing a search range within which to find a group of signals having maximum channel gain. At least one of: a first signal for a first user and a second signal for a second user may be selected, which are both within the reduced search range, and which provides a maximum system capacity. The first signal for the first user may be selected from the reduced search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the reduced search range. The reduced search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals.

01-03-2013

20130022001

Method and System for a Range Reduction Scheme for User Selection in a Multiuser MIMO Downlink Transmission - Various aspects of a method and a system for a range reduction scheme for user selection in a multiuser MIMO downlink transmission are presented. Aspects of a system for range reduction may comprise a range reduction processor that determines a plurality of channel measurements corresponding to a plurality of signals. The range reduction processor may compute a plurality of channel capacities based on the channel measurements corresponding to a subset of the plurality of signals having channel gain that is greater than a remaining portion of the plurality of signals. Aspects of a method may comprise determining a plurality of channel measurements corresponding to a plurality of signals, and computing a plurality of channel capacities based on said channel measurements corresponding to a subset of the plurality of signals having a channel gain that is greater than a remaining portion of the plurality of signals.

01-24-2013

20140016518

Method and System for a Greedy User Group Selection with Range Reduction in TDD Multiuser MIMO Downlink Transmission - Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a communication system, based on a signal for a user within a search range and at least one other signal for one other user within the search range. The search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals. The signal for the user may be selected from the search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the search range.

01-16-2014

Patent applications by Chengjin Zhang, La Jolla, CA US

Dongxian Zhang, La Jolla, CA US

Patent application number

Description

Published

20080261226

Biomarkers of neurodegenerative disease - The present invention provides biomarkers and diagnostic methods employing such biomarkers based on the discovery of genes that have a two-fold or greater difference in gene expression in the spinal cord of a pre-symptomatic mouse model of amyotrophic lateral sclerosis. Such biomarkers and diagnostic methods are useful for early detection of neural cell injury and death in acute and degenerative disease.

10-23-2008

Haitao Zhang, La Jolla, CA US

Patent application number

Description

Published

20100246471

DYNAMIC SHARED FORWARD LINK CHANNEL FOR A WIRELESS COMMUNICATION SYSTEM - A dynamic shared forward link channel (or “data” channel) is used to send multicast data to a group of wireless devices, e.g., using a common long code mask for the data channel. Reference power control (PC) bits are also sent on the data channel and used for signal quality estimation. A shared forward link control channel is used to send user-specific signaling to individual wireless devices, e.g., using time division multiplexing (TDM) and a unique long code mask for each wireless device. A shared forward link indicator channel is used to send reverse link (RL) PC bits to the wireless devices, e.g., using TDM. The data channel is jointly power controlled by all wireless devices receiving the data channel. The control and indicator channels are individually power controlled by each wireless device such that the signaling and RL PC bits sent on these channels for the wireless device are reliably received.

09-30-2010

Lianglin Zhang, La Jolla, CA US

Patent application number

Description

Published

20090191223

Peptides that selectively home to heart vasculature and related conjugates and methods - The present invention provides a variety of isolated peptides and peptidomimetics, which can be useful, for example, in constructing the conjugates of the invention or, where the peptide itself has biological activity, in unconjugated form as a therapeutic for treating any of a variety of cardiovascular diseases as described below. Thus, the present invention provides an isolated peptide or peptidomimetic which has a length of less than 60 residues and includes the amino acid sequence CRPPR (SEQ ID NO: 1) or a peptidomimetic thereof. The invention further provides an isolated peptide or peptidomimetic which has a length of less than 60 residues and includes the amino acid sequence CARPAR (SEQ ID NO: 5) or a peptidomimetic thereof, or amino acid sequence CPKRPR (SEQ ID NO: 6) or a peptidomimetic thereof.

07-30-2009

20100279918

Chimeric Constructs Between Cancer-Homing Peptides and Cell-Penetrating Peptides Coupled to Anticancer Drugs and/or Diagnostic Agent/Agents - A construct comprising a cancer-homing peptide, an optional linker and a cell-penetrating peptide coupled to an anticancer drug and/or a diagnostic agent is disclosed. The homing peptide is for example a linear pentapeptide such as CREKA (SEQ ID NO:1), AREKA (SEQ 5 ID NO: 23) or CREKA0 (SEQ ID NO: 23), or a cyclic nonapeptide CPGPEGAGC (SEQ ID NO:2), and the cell-penetrating peptide is for example one of the peptides SEQ ID NO:3-SEQ ID NO:20. The anticancer drug may be selected from alkylating agents, antimetabolites and cytotoxic antibiotics, and the diagnostic agent may be a fluorescent label. Further, a method of delivering an anticancer drug and/or a diagnostic agent into a cancer cell 0 comprising administration of a construct according to the invention in vivo or in vitro is described.

Peptides that Selectively Home to Heart Vasculature and Related Conjugates and Methods - The present invention provides a variety of isolated peptides and peptidomimetics, which can be useful, for example, in constructing the conjugates of the invention or, where the peptide itself has biological activity, in unconjugated form as a therapeutic for treating any of a variety of cardiovascular diseases as described below. Thus, the present invention provides an isolated peptide or peptidomimetic which has a length of less than 60 residues and includes the amino acid sequence CRPPR (SEQ ID NO: 1) or a peptidomimetic thereof. The invention further provides an isolated peptide or peptidomimetic which has a length of less than 60 residues and includes the amino acid sequence CARPAR (SEQ ID NO: 5) or a peptidomimetic thereof, or amino acid sequence CPKRPR (SEQ ID NO: 6) or a peptidomimetic thereof.

Yun-Wu Zhang, La Jolla, CA US

Patent application number

Description

Published

20090233993

COMPOSITIONS AND METHODS FOR INHIBITING GSK3 ACTIVITY AND USES THEREOF - Disclosed herein are compositions and methods relating to peptides. The peptides can inhibit amyloid beta (Aβ) generation and reduce GSK-3 activities. Further provided are compositions and methods for treating or preventing, for example, Alzheimer's disease, cancer, and diabetes.